编程屏蔽USB，大家来看看我的程序，不知道为什么这样。。。。

为了屏蔽U盘，我编了一个简单的FILTER，我理解中FILTER应该都差不多，如果只过滤不对包进行处理的话，下面是我的程序，比较简单。
extern "C"
NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject,IN PUNICODE_STRING RegistryString)
{
NTSTATUS status=STATUS_SUCCESS;
DriverObject->DriverExtension->AddDevice=MyFilterAddDevice;
DriverObject->DriverUnload=MyFilterUnload;
for(int i=0;i<IRP_MJ_MAXIMUM_FUNCTION;i++)
DriverObject->MajorFunction=MyFilterDispatch;
DriverObject->MajorFunction[IRP_MJ_POWER] = DispatchPower;
DriverObject->MajorFunction[IRP_MJ_PNP] = DispatchPnp;
  
return status;
}
VOID MyFilterUnload(IN PDRIVER_OBJECT DriverObject)
{

}
NTSTATUS MyFilterDispatch(IN PDEVICE_OBJECT fido,IN PIRP Irp)
{

Irp->IoStatus.Status =STATUS_UNSUCCESSFUL ;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp,IO_NO_INCREMENT);
return STATUS_UNSUCCESSFUL;

}

NTSTATUS MyFilterAddDevice(IN PDRIVER_OBJECT DriverObject,IN PDEVICE_OBJECT pdo)
{

 
NTSTATUS status;
PDEVICE_OBJECT fido;
PDEVICE_OBJECT fdo;
PMYFILTER_DEVICE_EXTENSION dx;
status=IoCreateDevice(DriverObject,\
sizeof(MYFILTER_DEVICE_EXTENSION),\
NULL,FILE_DEVICE_UNKNOWN,0,FALSE,&fido);
if(!NT_SUCCESS(status))
return status;
dx=(PMYFILTER_DEVICE_EXTENSION)fido->DeviceExtension;
dx->fdo=fido;
dx->pdo=pdo;
__try{

fdo=IoAttachDeviceToDeviceStack(fido,pdo);
dx->pNext=fdo;
fido->Flags |= fdo->Flags & (DO_DIRECT_IO|DO_BUFFERED_IO);
    fido->Flags |= DO_POWER_PAGABLE;
    fido->DeviceType = fdo->DeviceType;
    fido->Characteristics = fdo->Characteristics;
    fido->Flags &= ~DO_DEVICE_INITIALIZING;
}
__finally
{
  if (!NT_SUCCESS(status))
     IoDeleteDevice(fido);
}
  

return STATUS_SUCCESS;
}
NTSTATUS DispatchPnp(PDEVICE_OBJECT fido, PIRP Irp)
{
PMYFILTER_DEVICE_EXTENSION pdx=(PMYFILTER_DEVICE_EXTENSION)fido->DeviceExtension;
    PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(Irp);
    ULONG fcn = stack->MinorFunction;
    IoSkipCurrentIrpStackLocation(Irp);
    NTSTATUS  status= IoCallDriver(pdx->pNext, Irp);
    if (fcn == IRP_MN_REMOVE_DEVICE)
{
      IoDetachDevice(pdx->pNext);
      IoDeleteDevice(fido);
}
    return status;
/*return STATUS_UNSUCCESSFUL;*/
}
NTSTATUS DispatchPower(PDEVICE_OBJECT fido, PIRP Irp)
{
  PoStartNextPowerIrp(Irp);
  PMYFILTER_DEVICE_EXTENSION pdx = (PMYFILTER_DEVICE_EXTENSION)fido->DeviceExtension;
  IoSkipCurrentIrpStackLocation(Irp);
  NTSTATUS status = PoCallDriver(pdx->pNext, Irp);
  return status;
}
  
在注册表中{36FC9E60-C465-11CF-8056-444553540000}，这个是USB设备的GUID，里建个
UPPERFILTERS值为这个程序的服务，MYFILTER，但没有作用，U盘插上照认，很晕中。。
这个驱动主要是在DISPATHC的处理上，我对任何包，当然我指是读写等都简单地返回STATUS＿UNSUCCESSFUL，但这样好像对USB不起作用，不知道为什么。。。。
知道USB设备是靠URB通讯，但不清楚，请各位高手指点。。。

你的USB设备GUID应该是不对滴~~~~~~
这个a5dcbf10, 0x6530, 0x11d2, 0x90, 0x1f, 0x00, 0xc0, 0x4f, 0xb9, 0x51, 0xed
好象才是滴哦~~~~~~~~